Daylight Factor – the ratio of the light level inside a structure to the light level outside the structure. DF is a representative metric based on the CIE overcast sky for September 21 at 12:00pm.

Point Daylight Factor (PDF) is defined as the ratio of illuminance due to daylight at a point on the indoors working plane to simultaneous outdoor illuminance on a horizontal plane from an unobstructed …

The survey identified considerable concern amongst daylight experts and practitioners regarding the use of average Daylight Factor (DF) requirements as the basis for assessing compliance with Building …

Daylighting of the interior spaces of buildings and their functionally defined parts is proposed according to visual activities. The minimum values for daylight factor are set for individual visual activities. This …

Daylight Factor is defined as the ratio of the internal illuminance at a workplane point in a building to the unshaded, external horizontal illuminance under a CIE3 overcast sky.

To support a development of the current and future daylight indicators in the Swedish context, the authors have developed a comprehensive methodology for the evaluation of daylight levels in …

To determine the quality of daylight you must evaluate how evenly daylight is distributed within a room (the Daylight Uniformity), and the proportion of daylight within the room relative to outdoor conditions …